How to buy portal coin before launch?

Excuse me, I'm quite intrigued by the concept of investing in portal coins before their official launch. Could you please elaborate on the process? Are there any specific steps one should follow to ensure a successful purchase? Are there any risks associated with investing in pre-launch portal coins? Additionally, are there any trusted platforms or exchanges that facilitate such transactions? It would be great if you could provide some insights into these matters. Thank you in advance for your valuable information.